Percy Jackson and the Olympians: Legends

The Grove of Dodona is a stand of sacred oaks planted by the Titaness Rhea, in the first days of the world. They are located in Camp Half-Blood Forest, and it is the only oracle that is not affiliated with Apollo. The Myrmeke's Lair is currently the only known entrance to the grove. The Grove of Dodona had been planted by Rhea in the first days of the world and were ancient even when the first generation of Olympians were born. These sacred trees could actually speak and sometimes even issued prophecies.